46
Chemical Oceanography, 4th Edition
The equation for ordinary carbon is given by
R mix C deep = R mix C surface + B
(1.7)
where B is the amount of carbon added to the reservoir due to the destruction of organic
particles falling from the surface. The third equation is given by
R mix C surface ( 14 C/ C) surface + B ( 14 C/ C) surface = R mix C deep ( 14 C/ C) deep + V deep C deep ( 14 C/ C) λ (1.8)
where λ is the fraction of 14 C decaying each year, V deep is the volume of deep water, and
B = V deep (C deep – C surface ). Combining these equations and solving for R mix gives
R mix = (λ h A)/{[( 14 C/ C) surface /( 14 C/ C) deep – 1]}
(1.9)
60°N
30°N
EQ
30°S
60°S
180°W
90°W
0°
90°E
CFC-12 [pmol/kg] @ Depth [m] = first
CFC-11 [pmol/kg] @ Depth [m] = first
180°E
60°N
30°N
EQ
30°S
60°S
180°W
90°W
0°
90°E
180°E
0
2
4
6
8
10
0
1
2
3
4
5
Ocean Data View
Ocean Data View
Figure 1.51
The surface values of CFCs in the world ocean.